A little something I really liked and converted from Fully Operational the engineers splatbook for Age of Rebellion.

Quote:

MK VIII GRAVITIC MORTAR LAUNCHER
Built by Golan Arms, the Mk VIII launcher is an uncommon weapon. Designed primarily to clear minefields, the Mk VIII is, like most mortars, a simple smoothbore tube equipped with a bipod and a tiring mechanism. Instead of lobbing explosive shells into cover or suppressing troops, however, it fires a special round that detonates all anti-personnel and anti-vehicle mines in its area of effect. Using advanced gravitic technology, the rounds it fires produce powerful gravity fluctuations in a broad area upon impact. These gravity fluctuations trigger mines equipped with pressure or proximity sensors, causing them to detonate and clearing the way for troops and vehicles.

Gravitic Mortar LauncherModel: Golan Arms Mk VIII Gravitic Mortar Launcher
Type: Mine clearing mortar
Scale: Special
Skill: Missile Weapons: Mk VIII launcher
Ammo: 1
Cost: 2,800
Availability: 2, X
Range: 100-500/3/10 km
Damage: Special
Game Notes: When a gravitic round detonates inside a minefield, it triggers every mine within 100 meters. If the check is 6- the Game Master may decide only a fraction of the mines within the gravitic shell's area of effect detonate. Undetonated mines remain active and still pose a threat to characters, their allies, and their vehicles.

Interesting.. BUT could you explain
" If the check is 6- the Game Master may decide only a fraction of the mines within the gravitic shell's area of effect detonate. Undetonated mines remain active and still pose a threat to characters, their allies, and their vehicles. "

Somewhat more?

Do they roll a single die? Multiple? Do they need to hit a specific TN?

Could those who laid the mines, set them so as to counter this?_________________Confuscious sayeth, don't wash cat while drunk!

Interesting.. BUT could you explain:
" If the check is 6- the Game Master may decide only a fraction of the mines within the gravitic shell's area of effect detonate. Undetonated mines remain active and still pose a threat to characters, their allies, and their vehicles. "

Perhaps I should have stated, "If the demolitions check is 6 under the target number, the Game Master..."

garhkal wrote:

Somewhat more?

I have included the complete text provided within the book. There is no more information.

garhkal wrote:

Do they roll a single die? Multiple? Do they need to hit a specific TN?

It is a standard skill check versus the range difficulty.

garhkal wrote:

Could those who laid the mines, set them so as to counter this?

Per the description I would say no, unless the mines are specifically hardened against the gravitic waves. Otherwise, the mines detonate within the area of effect._________________Don Diestler
Host, Shooting Womp Rats
The D6 Podcast
http://d6holocron.com/shootingwomprats
@swd6podcast, Twitter